Bore seal

Abstract

An annular bore seal for sealing between connected first and second coaxially aligned members, each of which is provided with an internal frusto-conical seating surface tapering inwardly from their adjoining ends. The seal comprises: an inner cylindrical surface; annular end surfaces at opposite ends thereof; frusto-conical outer sealing surfaces adjacent each of the end surfaces and tapering outwardly therefrom; an outer alignment ring surface midway between the end surfaces; and annular relieved areas between the alignment ring surface and the frusto-conical sealing surfaces.

I claim: 
     
       1. An annular bore seal for sealing between connected first and second coaxially aligned and centrally bored members, each of which is provided with an internal frusto-conical seating surface tapering inwardly from the adjoining ends of said first and second members toward the bores thereof, said seal comprising: an inner cylindrical surface;   annular end surfaces at opposite ends of said inner surface;   frusto-conical outer sealing surfaces adjacent each of said end surfaces and tapering outwardly therefrom at an angle, with the axis of said seal, in the range of fifteen to twenty degrees;   an outer alignment ring surface midway between said end surfaces defined by the circular intersection of a pair of cones whose axes coincide with said seal axis; and   annular relieved areas between said alignment ring surface and said frusto-conical sealing surfaces.   
     
     
       2. An annular bore seal as set forth in claim 1 in which said outer alignment ring substantially coincides with the circular intersection of the projection of said frusto-conical sealing surfaces. 
     
     
       3. An annular bore seal as set forth in claim 1 in which the diameter of said alignment ring surface, when said first and second members are properly connected, is substantially the same as the major diameter of said frusto-conical seating surfaces. 
     
     
       4. An annular bore seal as set forth in claim 1 in which the angle of taper between the axis of said seal and said frusto-conical sealing surfaces is in the range of fifteen to twenty degrees. 
     
     
       5. An annular bore seal as set forth in claim 1 including other frusto-conical surfaces adjacent said ring surface tapering inwardly therefrom and at least partially providing said annular relieved areas. 
     
     
       6. An annular bore seal as set forth in claim 5 including cylindrical surfaces joining said frusto-conical sealing surfaces and said other frusto-conical surfaces to at least partially provide said annular relieved areas. 
     
     
       7. An annular bore seal as set forth in claim 5 in which the angle of taper between the axis of said seal member and said frusto-conical sealing surfaces is less than the angle of taper between said axis and said other frusto-conical surfaces. 
     
     
       8. An annular bore seal as set forth in claim 5 in which the angle of taper between the axis of said seal and said frusto-conical sealing surfaces is substantially the same as the angle of taper between said axis and said other frusto-conical surfaces. 
     
     
       9. An annular bore seal as set forth in claim 1 in which said frusto-conical seating surfaces of said first and second connected terminate at an annular shoulder formed internally of said connected members, the distance between the respective annular shoulders of said first and second connected members, when properly connected, being slightly greater than the axial length of said seal 
     
     
       10. An annular bore seal a set forth in claim 9 in which said inner bore surface of said seal forms a cylinder the diameter of which, when said first and second members are properly connected, is substantially the same as the adjoining bore diameter of said first and second members. 
     
     
       11. Fluid connection apparatus including first and second coaxially aligned and centrally bored members, each of which is provided with an internal frusto-conical seating surface tapering inwardly from the adjoining ends thereof; means for connecting said first and second members in said coaxial alignment; and an annular bore seal for sealing between said first and second members when connected, said annular bore seal comprising: an inner bore surface; annular end surfaces at opposite ends of said inner bore surface; frusto-conical outer sealing surfaces adjacent each of said end surfaces and tapering outwardly therefrom at an angle substantially the same as the taper angle of said frusto-conical seating surfaces of said first and second connected members; an outer alignment ring surface midway between said end surfaces defined by the circular intersection of a pair of cones whose axes coincide with the axis of said annular bore seal; and annular relieved areas between said alignment ring surface and said frusto-conical sealing surfaces.